<?php

/**
 * This file is part of the Propel package.
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @license    MIT License
 */

require_once dirname(__FILE__) . '/OMBuilder.php';
require_once dirname(__FILE__) . '/ClassTools.php';

/**
 * Generates the empty PHP5 stub query class for use with single table inheritance.
 *
 * This class produces the empty stub class that can be customized with application
 * business logic, custom behavior, etc.
 *
 *
 * @author     François Zaninotto
 * @package    propel.generator.builder.om
 */
class QueryInheritanceBuilder extends OMBuilder
{

	/**
	 * The current child "object" we are operating on.
	 */
	protected $child;

	/**
	 * Returns the name of the current class being built.
	 * @return     string
	 */
	public function getUnprefixedClassname()
	{
		return $this->getBuildProperty('basePrefix') . $this->getNewStubQueryInheritanceBuilder($this->getChild())->getUnprefixedClassname();
	}

	/**
	 * Gets the package for the [base] object classes.
	 * @return     string
	 */
	public function getPackage()
	{
		return ($this->getChild()->getPackage() ? $this->getChild()->getPackage() : parent::getPackage()) . ".om";
	}

	public function getNamespace()
	{
		if ($namespace = parent::getNamespace()) {
			if ($this->getGeneratorConfig() && $omns = $this->getGeneratorConfig()->getBuildProperty('namespaceOm')) {
				return $namespace . '\\' . $omns;
			} else {
				return $namespace;
			}
		}
	}

	/**
	 * Set the child object that we're operating on currrently.
	 * @param      $child Inheritance
	 */
	public function setChild(Inheritance $child)
	{
		$this->child = $child;
	}

	/**
	 * Returns the child object we're operating on currently.
	 * @return     Inheritance
	 * @throws     BuildException - if child was not set.
	 */
	public function getChild()
	{
		if (!$this->child) {
			throw new BuildException("The PHP5MultiExtendObjectBuilder needs to be told which child class to build (via setChild() method) before it can build the stub class.");
		}
		return $this->child;
	}

	/**
	 * Returns classpath to parent class.
	 * @return     string
	 */
	protected function getParentClassName()
	{
		$ancestorClassName = ClassTools::classname($this->getChild()->getAncestor());
		if ($this->getDatabase()->hasTableByPhpName($ancestorClassName)) {
			return $this->getNewStubQueryBuilder($this->getDatabase()->getTableByPhpName($ancestorClassName))->getClassname();
		} else {
			// find the inheritance for the parent class
			foreach ($this->getTable()->getChildrenColumn()->getChildren() as $child) {
				if ($child->getClassName() == $ancestorClassName) {
					return $this->getNewStubQueryInheritanceBuilder($child)->getClassname();
				}
			}
		}
	}
	
	/**
	 * Adds the include() statements for files that this class depends on or utilizes.
	 * @param      string &$script The script will be modified in this method.
	 */
	protected function addIncludes(&$script)
	{
		$requiredClassFilePath = $this->getStubQueryBuilder()->getClassFilePath();

		$script .="
require '".$requiredClassFilePath."';
";
	} // addIncludes()

	/**
	 * Adds class phpdoc comment and openning of class.
	 * @param      string &$script The script will be modified in this method.
	 */
	protected function addClassOpen(&$script)
	{
		$table = $this->getTable();
		$tableName = $table->getName();
		$tableDesc = $table->getDescription();

		$baseBuilder = $this->getStubQueryBuilder();
		$this->declareClassFromBuilder($baseBuilder);
		$baseClassname = $this->getParentClassName();

		$script .= "
/**
 * Skeleton subclass for representing a query for one of the subclasses of the '$tableName' table.
 *
 * $tableDesc
 *";
		if ($this->getBuildProperty('addTimeStamp')) {
			$now = strftime('%c');
			$script .= "
 * This class was autogenerated by Propel " . $this->getBuildProperty('version') . " on:
 *
 * $now
 *";
		}
		$script .= "
 * You should add additional methods to this class to meet the
 * application requirements.  This class will only be generated as
 * long as it does not already exist in the output directory.
 *
 * @package    propel.generator.".$this->getPackage()."
 */
class "  .$this->getClassname() . " extends " . $baseClassname . " {
";
	}

	/**
	 * Specifies the methods that are added as part of the stub object class.
	 *
	 * By default there are no methods for the empty stub classes; override this method
	 * if you want to change that behavior.
	 *
	 * @see        ObjectBuilder::addClassBody()
	 */
	protected function addClassBody(&$script)
	{
		$this->declareClassFromBuilder($this->getStubPeerBuilder());
		$this->declareClasses('PropelPDO', 'Criteria');
		$this->addFactory($script);
		$this->addPreSelect($script);
		$this->addPreUpdate($script);
		$this->addPreDelete($script);
		$this->addDoDeleteAll($script);
	}

	/**
	 * Adds the factory for this object.
	 * @param      string &$script The script will be modified in this method.
	 */
	protected function addFactory(&$script)
	{
		$builder = $this->getNewStubQueryInheritanceBuilder($this->getChild());
		$this->declareClassFromBuilder($builder);
		$classname = $builder->getClassname();
		$script .= "
	/**
	 * Returns a new " . $classname . " object.
	 *
	 * @param     string \$modelAlias The alias of a model in the query
	 * @param     Criteria \$criteria Optional Criteria to build the query from
	 *
	 * @return    " . $classname . "
	 */
	public static function create(\$modelAlias = null, \$criteria = null)
	{
		if (\$criteria instanceof " . $classname . ") {
			return \$criteria;
		}
		\$query = new " . $classname . "();
		if (null !== \$modelAlias) {
			\$query->setModelAlias(\$modelAlias);
		}
		if (\$criteria instanceof Criteria) {
			\$query->mergeWith(\$criteria);
		}
		return \$query;
	}
";
	}
	
	protected function addPreSelect(&$script)
	{
		$child = $this->getChild();
		$col = $child->getColumn();
		
		$script .= "
	/**
	 * Filters the query to target only " . $child->getClassname() . " objects.
	 */
	public function preSelect(PropelPDO \$con)
	{
		" . $this->getClassKeyCondition() . "
	}
";
	}

	protected function addPreUpdate(&$script)
	{
		$child = $this->getChild();
		$col = $child->getColumn();
		
		$script .= "
	/**
	 * Filters the query to target only " . $child->getClassname() . " objects.
	 */
	public function preUpdate(&\$values, PropelPDO \$con, \$forceIndividualSaves = false)
	{
		" . $this->getClassKeyCondition() . "
	}
";
	}

	protected function addPreDelete(&$script)
	{
		$child = $this->getChild();
		$col = $child->getColumn();
		
		$script .= "
	/**
	 * Filters the query to target only " . $child->getClassname() . " objects.
	 */
	public function preDelete(PropelPDO \$con)
	{
		" . $this->getClassKeyCondition() . "
	}
";
	}
	
	protected function getClassKeyCondition()
	{
		$child = $this->getChild();
		$col = $child->getColumn();
		return "\$this->addUsingAlias(" . $col->getConstantName() . ", " . $this->getPeerClassname()."::CLASSKEY_".strtoupper($child->getKey()).");";
	}
	
	protected function addDoDeleteAll(&$script)
	{
		$child = $this->getChild();
		
		$script .= "
	/**
	 * Issue a DELETE query based on the current ModelCriteria deleting all rows in the table
	 * Having the " . $child->getClassname() . " class.
	 * This method is called by ModelCriteria::deleteAll() inside a transaction
	 * 
	 * @param PropelPDO \$con a connection object
	 *
	 * @return integer the number of deleted rows
	 */
	public function doDeleteAll(\$con)
	{
		// condition on class key is already added in preDelete()
		return parent::doDelete(\$con);
	}
";
	}
	
	/**
	 * Closes class.
	 * @param      string &$script The script will be modified in this method.
	 */
	protected function addClassClose(&$script)
	{
		$script .= "
} // " . $this->getClassname() . "
";
	}

} // MultiExtensionQueryBuilder
